Taxes are due and payable on October 1, and are delinquent if not paid on or before January 31. Property Tax statements are mailed in October of each year, and taxes are due upon receipt, and delinquent if paid after January 31st.Central Time (CT) on the due date to be considered timely. Payments are generally processed in 2-4 days. 8. Central Time (CT) on the due date. Enter the amount you want to pay up to the amount due for that term. Make sure to pay total before your due date. Registration Payment Dates. Tax Due Dates ; April 15, Calendar-year corporations - File a 2024 income tax return (Form 1120) or file for an automatic six-month extension (Form 7004).